Expedition 43 was the 43rd expedition to the International Space Station. It commenced on 11 March 2015 with the undocking of Soyuz TMA-14M, returning the crew of Expedition 42 to Earth and ended with the departure of Soyuz TMA-15M on 11 June 2015.
The Expedition 43 crew spent an extra "bonus month" on board pending investigation of the Progress M-27M cargo spacecraft failure. On June 8, 2015 ISS adjusted its orbit to move to a safe distance from a piece of orbital space debris.
Zvezda, also known as the Zvezda Service Module, is a module of the International Space Station (ISS). It was the third module launched to the station, and provided all of the station's life support systems, some of which are supplemented in the US Orbital Segment (USOS), as well as living quarters for two crew members. It is the structural and functional center of the Russian Orbital Segment (ROS), which is the Russian part of the ISS. Crew assemble here to deal with emergencies on the station.
The module was manufactured in the USSR by Energia, with major sub-contracting work by GKNPTs Khrunichev. Zvezda was launched on a Proton launch vehicle on 12 July 2000, and docked with the Zarya module on 26 July 2000 at 01:45 UTC. It is a descendant of the Salyut programme's.